U.S. drought expands in top wheat-growing state of Kansas

(Reuters) - Crop-killing drought deepened in Kansas over the last week, further jeopardizing this season's production of winter wheat, a key U.S. crop.

Kansas is generally the top U.S. wheat-growing state, but the new crop planted last fall has been struggling with a lack of soil moisture. Without rain and/or heavy snow before spring, millions of acres of wheat could be ruined.

But a new climatology report issued Thursday showed no signs of improvement for Kansas, or neighboring farm states. Instead, drought was holding tight or growing worse in that region, according to the Drought Monitor report issued Thursday by a consortium of federal and state climatology experts.

Roughly 57.64 percent of the contiguous United States was in at least "moderate" drought as of January 22, an improvement from 58.87 percent a week earlier, according to the Drought Monitor. But the worst level of drought, dubbed "exceptional," expanded slightly to 6.36 percent, up from 6.31 percent of the country.

The worst-hit area is the High Plains. Severe drought blanketed 87.25 percent of the High Plains, unchanged from the week before, but extreme drought grew to 61.30 percent, up from 61.27 percent, and exceptional drought expanded to 27.02 percent, up from 26.81 percent the prior week.

Fully 100 percent of the land area in Kansas, Colorado, Nebraska and Oklahoma remained engulfed in severe drought or worse, according to the Drought Monitor.

Kansas saw a marked increase in the spread of the worst levels of drought over the last week, the report said. The level of extreme drought grew to 79.53 percent from 79.34 percent, and exceptional drought grew to 36.14 percent, up from 34.87 percent.